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23e7e3ae JVH |
1 | /** |
2 | * Copyright (C) 2011-2012 Juho Vähä-Herttua | |
3 | * | |
4 | * This library is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU Lesser General Public | |
6 | * License as published by the Free Software Foundation; either | |
7 | * version 2.1 of the License, or (at your option) any later version. | |
8 | * | |
9 | * This library is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | * Lesser General Public License for more details. | |
13 | */ | |
14 | ||
2340bcd3 JVH |
15 | #include <stdlib.h> |
16 | #include <string.h> | |
17 | #include <assert.h> | |
18 | ||
19 | #include "http_request.h" | |
20 | #include "http_parser.h" | |
21 | ||
22 | struct http_request_s { | |
23 | http_parser parser; | |
24 | http_parser_settings parser_settings; | |
25 | ||
26 | const char *method; | |
27 | char *url; | |
28 | ||
29 | char **headers; | |
30 | int headers_size; | |
31 | int headers_index; | |
32 | ||
33 | char *data; | |
34 | int datalen; | |
35 | ||
36 | int complete; | |
37 | }; | |
38 | ||
39 | static int | |
40 | on_url(http_parser *parser, const char *at, size_t length) | |
41 | { | |
42 | http_request_t *request = parser->data; | |
43 | int urllen = request->url ? strlen(request->url) : 0; | |
44 | ||
45 | request->url = realloc(request->url, urllen+length+1); | |
46 | assert(request->url); | |
47 | ||
48 | request->url[urllen] = '\0'; | |
49 | strncat(request->url, at, length); | |
50 | return 0; | |
51 | } | |
52 | ||
53 | static int | |
54 | on_header_field(http_parser *parser, const char *at, size_t length) | |
55 | { | |
56 | http_request_t *request = parser->data; | |
57 | ||
58 | /* Check if our index is a value */ | |
59 | if (request->headers_index%2 == 1) { | |
60 | request->headers_index++; | |
61 | } | |
62 | ||
63 | /* Allocate space for new field-value pair */ | |
64 | if (request->headers_index == request->headers_size) { | |
65 | request->headers_size += 2; | |
66 | request->headers = realloc(request->headers, | |
67 | request->headers_size*sizeof(char*)); | |
68 | assert(request->headers); | |
69 | request->headers[request->headers_index] = NULL; | |
70 | request->headers[request->headers_index+1] = NULL; | |
71 | } | |
72 | ||
73 | /* Allocate space in the current header string */ | |
74 | if (request->headers[request->headers_index] == NULL) { | |
75 | request->headers[request->headers_index] = calloc(1, length+1); | |
76 | } else { | |
77 | request->headers[request->headers_index] = realloc( | |
78 | request->headers[request->headers_index], | |
79 | strlen(request->headers[request->headers_index])+length+1 | |
80 | ); | |
81 | } | |
82 | assert(request->headers[request->headers_index]); | |
83 | ||
84 | strncat(request->headers[request->headers_index], at, length); | |
85 | return 0; | |
86 | } | |
87 | ||
88 | static int | |
89 | on_header_value(http_parser *parser, const char *at, size_t length) | |
90 | { | |
91 | http_request_t *request = parser->data; | |
92 | ||
93 | /* Check if our index is a field */ | |
94 | if (request->headers_index%2 == 0) { | |
95 | request->headers_index++; | |
96 | } | |
97 | ||
98 | /* Allocate space in the current header string */ | |
99 | if (request->headers[request->headers_index] == NULL) { | |
100 | request->headers[request->headers_index] = calloc(1, length+1); | |
101 | } else { | |
102 | request->headers[request->headers_index] = realloc( | |
103 | request->headers[request->headers_index], | |
104 | strlen(request->headers[request->headers_index])+length+1 | |
105 | ); | |
106 | } | |
107 | assert(request->headers[request->headers_index]); | |
108 | ||
109 | strncat(request->headers[request->headers_index], at, length); | |
110 | return 0; | |
111 | } | |
112 | ||
113 | static int | |
114 | on_body(http_parser *parser, const char *at, size_t length) | |
115 | { | |
116 | http_request_t *request = parser->data; | |
117 | ||
118 | request->data = realloc(request->data, request->datalen+length); | |
119 | assert(request->data); | |
120 | ||
121 | memcpy(request->data+request->datalen, at, length); | |
122 | request->datalen += length; | |
123 | return 0; | |
124 | } | |
125 | ||
126 | static int | |
127 | on_message_complete(http_parser *parser) | |
128 | { | |
129 | http_request_t *request = parser->data; | |
130 | ||
131 | request->method = http_method_str(request->parser.method); | |
132 | request->complete = 1; | |
133 | return 0; | |
134 | } | |
135 | ||
136 | http_request_t * | |
462c72aa | 137 | http_request_init(void) |
2340bcd3 JVH |
138 | { |
139 | http_request_t *request; | |
140 | ||
141 | request = calloc(1, sizeof(http_request_t)); | |
142 | if (!request) { | |
143 | return NULL; | |
144 | } | |
462c72aa | 145 | http_parser_init(&request->parser, HTTP_REQUEST); |
2340bcd3 JVH |
146 | request->parser.data = request; |
147 | ||
148 | request->parser_settings.on_url = &on_url; | |
149 | request->parser_settings.on_header_field = &on_header_field; | |
150 | request->parser_settings.on_header_value = &on_header_value; | |
151 | request->parser_settings.on_body = &on_body; | |
152 | request->parser_settings.on_message_complete = &on_message_complete; | |
153 | ||
154 | return request; | |
155 | } | |
156 | ||
157 | void | |
158 | http_request_destroy(http_request_t *request) | |
159 | { | |
160 | int i; | |
161 | ||
162 | if (request) { | |
163 | free(request->url); | |
164 | for (i=0; i<request->headers_size; i++) { | |
165 | free(request->headers[i]); | |
166 | } | |
167 | free(request->headers); | |
168 | free(request->data); | |
169 | free(request); | |
170 | } | |
171 | } | |
172 | ||
173 | int | |
174 | http_request_add_data(http_request_t *request, const char *data, int datalen) | |
175 | { | |
176 | int ret; | |
177 | ||
178 | assert(request); | |
179 | ||
180 | ret = http_parser_execute(&request->parser, | |
181 | &request->parser_settings, | |
182 | data, datalen); | |
183 | return ret; | |
184 | } | |
185 | ||
186 | int | |
187 | http_request_is_complete(http_request_t *request) | |
188 | { | |
189 | assert(request); | |
190 | return request->complete; | |
191 | } | |
192 | ||
193 | int | |
194 | http_request_has_error(http_request_t *request) | |
195 | { | |
196 | assert(request); | |
197 | return (HTTP_PARSER_ERRNO(&request->parser) != HPE_OK); | |
198 | } | |
199 | ||
200 | const char * | |
201 | http_request_get_error_name(http_request_t *request) | |
202 | { | |
203 | assert(request); | |
204 | return http_errno_name(HTTP_PARSER_ERRNO(&request->parser)); | |
205 | } | |
206 | ||
207 | const char * | |
208 | http_request_get_error_description(http_request_t *request) | |
209 | { | |
210 | assert(request); | |
211 | return http_errno_description(HTTP_PARSER_ERRNO(&request->parser)); | |
212 | } | |
213 | ||
214 | const char * | |
215 | http_request_get_method(http_request_t *request) | |
216 | { | |
217 | assert(request); | |
218 | return request->method; | |
219 | } | |
220 | ||
221 | const char * | |
222 | http_request_get_url(http_request_t *request) | |
223 | { | |
224 | assert(request); | |
225 | return request->url; | |
226 | } | |
227 | ||
228 | const char * | |
229 | http_request_get_header(http_request_t *request, const char *name) | |
230 | { | |
231 | int i; | |
232 | ||
233 | assert(request); | |
234 | ||
235 | for (i=0; i<request->headers_size; i+=2) { | |
236 | if (!strcmp(request->headers[i], name)) { | |
237 | return request->headers[i+1]; | |
238 | } | |
239 | } | |
240 | return NULL; | |
241 | } | |
242 | ||
243 | const char * | |
244 | http_request_get_data(http_request_t *request, int *datalen) | |
245 | { | |
246 | assert(request); | |
247 | ||
248 | if (datalen) { | |
249 | *datalen = request->datalen; | |
250 | } | |
251 | return request->data; | |
252 | } |